2022年12月1日 · Overview One of the Nine Realms in Norse mythology, Niflheim was a world of elemental ice and cold. Though seldom mentioned in Norse lore, Niflheim occupied a place of enormous cosmic significance: it was Niflheim that brought forth Ymir, the first giant, and Buri, the first of the Aesir gods, Buri. In time, Niflheim became synonymous with Hel, the world of the dead, ruled by the goddess of ...